Animation is exported, but does not appear along with the mesh of the object
If you're still after an answer, I have found a few different soloutions to various Blender>Unreal problems that when I combine, seem to work. Could be one of these:


Don't have fullstops in your bone names
Rename your Armature to anything else
Don't call your root bone 'Spine' (You've not done this. Could jut need to be carful eitheir way.)


Not sure if any of these help this particular issue, as mine is usually just everything importing microscopic.